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UCC256403: Dimensioning feedback with UCC25640x Design Calculator Rev4.0

Ralf Hoffmann
Prodigy 40 points
Part Number: UCC256403

When selecting the worksheet for the feedback circuit with the above tool, you can see very nice Bode and phase diagrams.


However, as soon as I change a value even slightly, the graphs disappear.

Is there an update button or similar that I haven't found yet ?

  • 0
    TI__Mastermind 44620 points

    Hi Ralf,

    Can you confirm which version of Excel you are using? When I make any changes, I see an immediate update on the plots. There is no refresh or update button to make this happen.

    By the way we the newer UCC25660 series available now. This LLC can resonate at a much higher frequency. 

    Regards,

    John

  • 0
    Prodigy 40 points

    Hi John,

    we use Microsoft 365 Enterprirs - Excel Version 2402.

    That's the Excelsheet without changes: 

    Graphs without changes:

    Graphs with the change of Rf from 9,09 to 9,09001:

  • 0 in reply to Ralf Hoffmann
    TI__Mastermind 44620 points

    Hi Ralf,

    I use a mac and on mine, I can change all of the yellow fields and the graphs update accordingly. I am going to loop in someone using a Windows machine to see if they are having the same issue as you.

    Regards,